A very interesting concept!
I've been encouraging my own family to gradually lower the amount of salt we use in our foods, thus simply getting used to a less salty flavor. This is probably a more naturalistic approach, given the fact that not all salted foods can be eaten with such a spoon.
If there are studies on this spoon in the future showing that it does, indeed, reduce salt consumption and results in decreased levels of hypertension, I'll be inclined to purchase one for all of my patients lol!
You a doctor?
I sure hope so, otherwise I've been grievously lied to